I seem to recall that Readability required transmitting the page I was viewing to their servers, so I found myself avoiding it. I don't know if there were good alternatives, but I do have faith that Mozilla's will be good (although I haven't tried the nightly or anything), so I'm excited about that. Once I used it for a while, it felt like something a browser should just have.
We've put the source we're using up on github ( https://github.com/mozilla/readability ) and plan to use the same library on all platforms. Any contributions are welcome.
